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Blade for electrophotography

A squeegee and polyurethane technology, which is applied to circuits, electrical recordings, electrical components, etc., can solve the problems of squeegee application and squeegee reversal, and achieve the effects of reducing load, increasing printing speed, and low cost

Inactive Publication Date: 2013-02-13
BANDO CHEM IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These all apply a high load to the scraper, and the scraper of the existing specification (such as JIS (Japanese Industrial Standard)-A hardness is less than 85 degrees) will cause problems such as scraper reversal.

Method used

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  • Blade for electrophotography
  • Blade for electrophotography
  • Blade for electrophotography

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0159] An example of the blade for cleaning the blade is shown. The manufacturing method uses a continuous molding method using a rotating molding drum that forms grooves on the outer periphery.

[0160]

[0161] Polyurethane elastic rubber member: thickness 2.0mm, width 12.3mm, length 326mm

[0162] The size of the edge: the size shown in Table 2

[0163] Metal support body: steel plate with a thickness of 1.2mm

[0164] Adhesive treatment: use dimer acid type hot melt adhesive

[0165]

[0166] The combination of ester urethane and ether urethane used in the edge layer or base layer is as shown in Table 1. Table 3 shows combinations and evaluations of urethanes.

[0167] Table 1

[0168]

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Abstract

Disclosed is a polyurethane blade having an edge portion and a backup portion that have different compositions from each other. The polyurethane that forms the edge portion has higher hardness than the polyurethane that forms the backup portion. The polyurethane that forms the backup portion has a JIS-A hardness of 65-80, while the polyurethane that forms the edge portion has (1) a JIS-A hardness of 75-100 and a tan d peak temperature of from -20 DEG C to -1 DEG C or (2) a JIS-A hardness of 85-100 and a tan d peak temperature of from -20 DEG C to 60 DEG C. The blade does not suffer from blade inversion or blade squealing even in cases where the hardness of a coating film of an image carrier or the printing speed is increased.

Description

technical field [0001] The present invention relates to a cleaning blade used in electrophotographic devices for the purpose of removing toner remaining in image carriers such as photosensitive drums, transfer belts, and intermediate transfer bodies. In addition, it also relates to a developing blade used in the developing process. Furthermore, it also relates to a charging blade for charging an image carrier. Background technique [0002] In the past, most of the scrapers used were single-layer scrapers (single material). In addition, some of them are multi-layer scrapers (lamination of flat sheets of multi-layer materials) using centrifugal molding, etc. [0003] Since these scrapers are difficult to clean at low temperature, high-speed printing, spherical toner, etc., there is a problem of poor cleaning, and the stick slip of the scraper becomes larger under high temperature and high humidity. , scraper screaming, damage and other problems, the service life is not sati...

Claims

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Application Information

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IPC IPC(8): G03G21/10G03G15/02G03G15/08
CPCG03G21/0011G03G21/0023G03G21/0017
Inventor 中见正宏中岛英贵谷新太
Owner BANDO CHEM IND LTD
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